The hydrolysis of alkyl halides by aqueous NaOH is best termed as:

(1) electrophilic substitution reaction

(2) electrophilic addition reaction

(3) nucleophilic addition reaction

(4) nucleophilic substitution reaction

Subtopic:  SN1 & SN2 Reactions |
 65%
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"The negative part of the addendum adds on the carbon atom joined to the least number of hydrogen atoms." This statement is called as:

(1) Markownikoff's rule

(2) Peroxide effect

(3) Baeyer's strain theory

(4) Thiele's theory

Subtopic:  Addition Reaction of C=C |
 79%
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Heterolysis of propane gives:

(1) Methyl and ethyl free radicals

(2) Methylium cation and Ethyl anion

(3) Methyl anion and Ethylium cation

(4) Methylium and Ethylium cations

Subtopic:  Reaction Intermediates |
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Dehydrogenation of ethanol to give ethanal is:(1) additional reaction  
(2) αα elimination reaction   
(3) αβ elimination reaction   
(4) αγ elimination reaction

Subtopic:  Hofmann's Elimination & Saytzeff Elimination |
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Which step is the chain termination step in the following mechanism?

(i) Cl2hνCl+Cl
(ii) Cl+ CH4CH3+ HCl
(iii)CH3+Cl2CH3Cl+Cl
(iv)Cl+CH3CH3Cl

1. (i)

2. (ii)

3. (iii)

4. (iv)

Subtopic:  Reaction Intermediates |
 71%
From NCERT
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Which step is chain propagation step in the following mechanism?

(i) Cl2hνCl+Cl
(ii) Cl+ CH4CH3+ HCl
(iii)Cl+ClCl2
(iv)CH3+ HClCH3Cl

1. (i)

2. (ii)

3. (iii)

4.  (iv)

Subtopic:  Addition Reaction of C=N, C=0 |
 68%
From NCERT
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SN1 mechanism for the reaction,

R-X+KOHROH+KX follow:

(1) carbocation mechanism

(2) carbanion mechanism

(3) free radical mechanism

(4) either of these

Subtopic:  SN1 & SN2 Reactions |
 75%
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The elimination reaction among the following is:

1. CH3CH3+Cl2CH3CH2Cl+ HCl

2. CH3Cl+ KOH(aq.) CH3OH +KCl

3. CH2=CH2 +Br2 CH2BrCH2Br

4. C2H5Br+ KOH(alc.) C2H4 + KBr+H2O

Subtopic:  Reaction Intermediates |
 82%
From NCERT
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Which of the following is an example of the elimination reaction?

(1) Chlorination of methane

(2) dehydration of ethanol

(3) nitration of benzene

(4) hydroxylation of ethylene

 

Subtopic:  Reaction Intermediates |
 84%
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The formation of cyanohydrin from a ketone is an example of:

(1) electrophilic addition

(2) nucleophilic addition

(3) nucleophilic substitution

(4) electrophilic substitution

Subtopic:  Addition Reaction of C=N, C=0 |
 69%
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